Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abebdc2d0c88ef3…

MALICIOUS

PDF

74.2 KB Created: 2021-03-08 17:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 83d590d7940a9ad438d000a3e3c4e671 SHA-1: b3c6b40a391e21578c67ef2b4fb69c0894299ff2 SHA-256: 7abebdc2d0c88ef33c1bb5ffa6cbfd2c99b6c734a2fa69eb2d10b64834375479
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable domains or are used in a link farm strategy. The primary URL, zajinet.ru, is presented with a UTM parameter suggesting it's related to a search for 'dell u2711 manual pdf', indicating a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=dell+u2711+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd2ab9114dd2.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/velaluka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447631/normal_60315fcf5cf9c.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/is_there_a_part_2_to_snow_white_and_the_huntsman.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496404/normal_5ffd9dfce829e.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/sizofawimeriwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc9f942-2e42-493c-ab58-323df5590611/27576223896.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_ca5cfc481c544d74b1c5c9beacc1fff7.pdf?index=trueIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_10ff0d3c2757464f99ca01d8f74c75c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/622264f5-dc7e-4d6f-b12b-9b39a79e3a54/sinners_in_the_hand_of_an_angry_god_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4512a12-877b-48eb-ad5e-ee3f102a1ee8/26328213665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89a44d5-8c8b-4cc3-b023-ba223ed76f0b/bosch_silence_plus_46_dba_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76e1091-0b47-4e65-ba80-66940857639b/how_to_use_resistance_tubes_with_handles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc985e7-707b-4aed-8600-0d8f3f882b33/64536024856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b2fece-b468-48a1-9c37-88247389f957/48729872118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32d686a-315b-4216-99c4-01ffb5aba667/varomojex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a9947e-2a28-44e4-958c-1563f7471913/afl_football_training_drills_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7a46d-b2f2-4c0c-b7b9-8de6a7ec615b/lodoborojomivubizodadidoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c01aa5-7043-474b-aae9-8b5a13bd9886/how_to_clean_philips_avent_bottle_sterilizer.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/platos_republic_summary_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e1f50e-3302-4028-97b1-fd81848f348f/78407652688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357b978e-d00e-429b-baec-1b37e659f54e/jevezigipedanazudume.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD998 2968 bytes
SHA-256: c3535dd41476eebf6ac32815e39482f32909ce4a3dab0c33feaa9cf7a3447b7d
font_01_sfnt_off0000e42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 5176 bytes
SHA-256: 7dbffa10e8c138a29d8088a9c4b2234f49028693cfdce748662af7138daae10e
font_02_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10496 bytes
SHA-256: c582cdd5f61bf3f9daa2c5515c2b41070b799694b8154793e7bbe5c309709443

Open this report in the interactive analyzer, or submit your own file for analysis.